ICD-10 I32
Billable / Specific CCPericarditis in diseases classified elsewhere
About ICD-10-CM I32
ICD-10-CM code I32 represents Pericarditis in diseases classified elsewhere. This is a billable/specific code in the Circulatory System chapter (block I32). The 2026 edition of ICD-10-CM I32 became effective on October 1, 2025.
Coding Tips for I32
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I32 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Type 1 Excludes
Pure excludes, these codes can never be coded together with I32. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- pericarditis (in):
- coxsackie (virus) (B33.23)
- gonococcal (A54.83)
- meningococcal (A39.53)
- rheumatoid (arthritis) (M05.31)
- syphilitic (A52.06)
- systemic lupus erythematosus (M32.12)
- tuberculosis (A18.84)
Coding Notes
Code First
- underlying disease
Inpatient DRG Impact, CC
codes Pericarditis in diseases classified elsewhere. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for I32
Local Coverage Determinations (LCDs) from CMS MACs that list I32 as a covered diagnosis.
Showing top 10 of 266 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I32.
1 Aetna
1 Cigna
5 Medicare
CPT Codes Commonly Billed with I32
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 90999 CMS LCD: Billing and Coding: Frequency of Hemodialysis CMS LCD
Convert I32 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| I32 | 4200 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I32
Other codes in section I30-I5A (Other forms of heart disease).
ICD-10 I32, Billing FAQ
Is ICD-10 code I32 billable? +
Yes, I32 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What codes are Type 1 Excludes for I32? +
Type 1 Excludes (never code together with I32): pericarditis (in):; coxsackie (virus) (B33.23); gonococcal (A54.83)
Is I32 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What CPT codes are commonly billed with I32? +
Procedures frequently paired with I32 include: 90999.
What ICD-9 codes does I32 map to? +
Per CMS GEMs, I32 maps to ICD-9 codes: 4200. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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